I tried to experiment with using clang for building packages. I started with webkit-gtk and immediately hit an error that I need at least GCC 7.3.x or Clang >= 5 for C++17-specific compiler flags. I have clang 10. The problem is in the way flag-o-matic.eclass checks for the compiler flags. It adds -Werror and the harmless warning about CUDA 10.2 incompatibility with clang-10 becomes blocking. clang-10: error: Unknown CUDA version 10.2. Assuming the latest supported version 10.1 [-Werror,-Wunknown-cuda-version]
I'm afraid it's too high-level description of a problem. Please provide more details on what is actually failing: 1. Is it a ebuild you wrote or something in ::gentoo? Do link or attach the ebuild. 2. Post 'emerge --info' so we could see what is being mangled by flag-o-matic. 3. Please attach build.log that illustrates a problem.
Created attachment 620710 [details] ebuild I tried to build with clang
Created attachment 620712 [details] the ebuild I tried to build with clang
PF16W6Y2 ~ # emerge --info webkit-gtk Portage 2.3.94 (python 3.6.10-final-0, default/linux/amd64/17.1/desktop/gnome/systemd, gcc-9.3.0, glibc-2.30-r5, 5.5.9-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-5.5.9-gentoo-x86_64-Intel-R-_Core-TM-_i7-8850H_CPU_@_2.60GHz-with-gentoo-2.7 KiB Mem: 32632100 total, 9427200 free KiB Swap: 33554428 total, 32667644 free Timestamp of repository gentoo: Sun, 15 Mar 2020 14:08:54 +0000 Head commit of repository gentoo: 3b16c8dce88885c0270311b98376840772afd06e sh bash 5.0_p16 ld GNU ld (Gentoo 2.34 p1) 2.34.0 app-shells/bash: 5.0_p16::gentoo dev-java/java-config: 2.2.0-r4::gentoo dev-lang/perl: 5.30.1::gentoo dev-lang/python: 2.7.17-r1::gentoo, 3.6.10::gentoo, 3.7.7::gentoo, 3.8.2::gentoo dev-util/cmake: 3.16.5::gentoo dev-util/pkgconfig: 0.29.2::gentoo sys-apps/baselayout: 2.7::gentoo sys-apps/sandbox: 2.18::gentoo sys-devel/autoconf: 2.13-r1::gentoo, 2.69-r5::gentoo sys-devel/automake: 1.16.1-r2::gentoo sys-devel/binutils: 2.34::gentoo sys-devel/gcc: 8.4.0::gentoo, 9.3.0::gentoo sys-devel/gcc-config: 2.2.1::gentoo sys-devel/libtool: 2.4.6-r6::gentoo sys-devel/make: 4.3::gentoo sys-kernel/linux-headers: 5.5::gentoo (virtual/os-headers) sys-libs/glibc: 2.30-r5::gentoo Repositories: gentoo location: /usr/portage sync-type: git sync-uri: git://github.com/gentoo-mirror/gentoo.git priority: -1000 dlang location: /var/lib/layman/dlang masters: gentoo priority: 50 gentoo-zh location: /var/lib/layman/gentoo-zh masters: gentoo priority: 50 go-overlay location: /var/lib/layman/go-overlay masters: gentoo priority: 50 steam-overlay location: /var/lib/layman/steam-overlay masters: gentoo priority: 50 tlp location: /var/lib/layman/tlp masters: gentoo priority: 50 rugubara location: /var/lib/layman/rugubara masters: gentoo priority: 100 ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -mtune=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe -mtune=native" DISTDIR="/usr/portage/distfiles" ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR" FCFLAGS="-O2 -pipe -mtune=native" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe -mtune=native" GENTOO_MIRRORS="http://mirror.netcologne.de/gentoo/ http://mirror.yandex.ru/gentoo-distfiles/" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j8" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" USE="X a52 aac acl acpi aio alsa amd64 bash-completion berkdb bluetooth branding bzip2 cacert cairo cdda cdr cgroup-hybrid cli client colord crypt cups cxx dbus djvu dri dri3 dts dvd dvdr eds emboss encode evo exif fat ffmpeg flac fortran gdbm gif gnome gnome-keyring gnome-online-accounts gpm graphite gstreamer gtk gtk3 iconv icu introspection ipv6 jack jpeg jpeg2k lcms ldap libglvnd libnotify libsecret libtirpc libzfs lm_sensors lv2 mad mng mp3 mp4 mpeg multilib native-headset nautilus ncat ncurses networkmanager nls nptl nvenc nvme ogg opengl openmp opus pam pango pcre pdf png policykit ppds pulseaudio qt5 raw readline sdl sdl2 seccomp smp sna sound spell spice split-usr ssl startup-notification svg systemd tcpd thunderbolt tiff tracker truetype udev udisks uefi unicode upower usb usbredir user-session vaapi vala vdpau virgl vorbis wayland webdav wireguard wxwidgets x264 x265 xattr xcb xml xv xvid zeroconf zfs zlib" ABI_X86="64" ADA_TARGET="gnat_2018" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput wacom" KERNEL="linux" L10N="en ru" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-2" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_6" PYTHON_TARGETS="python2_7 python3_6" RUBY_TARGETS="ruby24 ruby25 ruby26 ruby27" USERLAND="GNU" VIDEO_CARDS="i965 iris nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS ================================================================= Package Settings ================================================================= net-libs/webkit-gtk-2.26.4-r1::gentoo was built with the following: USE="X egl geolocation gnome-keyring gstreamer introspection jpeg2k jumbo-build libnotify opengl (seccomp) spell wayland (-aqua) -coverage -gles2-only -gtk-doc -test" ABI_X86="(64)" FEATURES="binpkg-docompress news pid-sandbox strict unknown-features-warn assume-digests unmerge-logs multilib-strict binpkg-logs protect-owned ebuild-locks binpkg-dostrip fixlafiles userpriv preserve-libs network-sandbox ipc-sandbox userfetch merge-sync parallel-fetch usersandbox sandbox distlocks unmerge-orphans config-protect-if-modified qa-unresolved-soname-deps sfperms usersync" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--no-keep-memory"
Created attachment 620714 [details] build.log
I tracked this call in the ebuild if ! test-flag-CXX -std=c++17 ; then die "You need at least GCC 7.3.x or Clang >= 5 for C++17-specific compiler flags" fi to flag-o-matic and added debug echoes to it. I ran the test command that flagomatic run to test -std=c++17. The only error was clang-10: error: Unknown CUDA version 10.2. Assuming the latest supported version 10.1 [-Werror,-Wunknown-cuda-version]
I turned the compiler to clang using package.env net-libs/webkit-gtk compiler-clang-lto /etc/portage/env/compiler-clang-lto: CC="clang" CXX="clang++" CFLAGS="${CFLAGS} -flto=thin" CXXFLAGS="${CXXFLAGS} -flto=thin" LDFLAGS="-Wl,-O2 -Wl,--as-needed" #please use whichever optimization level you're comfortable with
Created attachment 620716 [details] die.env
I tried to run the following command locally, but it does not fail for me: $ PORTAGE_TMPDIR=/tmp/bug CFLAGS="-O2 -pipe -mtune=native -flto=thin" CXXFLAGS="-O2 -pipe -mtune=native -flto=thin" LDFLAGS="-Wl,-O1 -Wl,--as-needed" CC=clang CXX=clang++ ebuild --debug webkit-gtk-2.26.4-r1.ebuild clean pretend; echo $? Can you check if it fails for you? And if it does attach it's output.
Also, can you post 'ls -l1 /opt/cuda/bin' output? I wonder if somehow unrelated compiler takes precedence and breaks your environment.
PF16W6Y2 ~ # ls -l1 /opt/cuda/bin/ total 45327 -rwxr-xr-x 1 root root 80576 фев 18 23:27 bin2c drwxr-xr-x 2 root root 4 фев 18 23:27 crt -rwxr-xr-x 1 root root 431 фев 18 23:27 cuda-config -rwxr-xr-x 1 root root 4833904 фев 18 23:27 cudafe++ -rwxr-xr-x 1 root root 397480 фев 18 23:27 cuda-memcheck -rwxr-xr-x 1 root root 688016 фев 18 23:27 cuda-uninstaller -rwxr-xr-x 1 root root 212224 фев 18 23:27 cuobjdump -rwxr-xr-x 1 root root 195600 фев 18 23:27 fatbinary -rwxr-xr-x 1 root root 229504 фев 18 23:27 nvcc -rwxr-xr-x 1 root root 417 фев 18 23:27 nvcc.profile -rwxr-xr-x 1 root root 23034280 фев 18 23:27 nvdisasm -rwxr-xr-x 1 root root 8092008 фев 18 23:27 nvlink -rwxr-xr-x 1 root root 97168 фев 18 23:27 nvprune -rwxr-xr-x 1 root root 7955808 фев 18 23:27 ptxas
Created attachment 620736 [details] debug of pretend
(In reply to Anton Gubarkov from comment #11) > PF16W6Y2 ~ # ls -l1 /opt/cuda/bin/ > total 45327 > -rwxr-xr-x 1 root root 80576 фев 18 23:27 bin2c > drwxr-xr-x 2 root root 4 фев 18 23:27 crt > -rwxr-xr-x 1 root root 431 фев 18 23:27 cuda-config > -rwxr-xr-x 1 root root 4833904 фев 18 23:27 cudafe++ > -rwxr-xr-x 1 root root 397480 фев 18 23:27 cuda-memcheck > -rwxr-xr-x 1 root root 688016 фев 18 23:27 cuda-uninstaller > -rwxr-xr-x 1 root root 212224 фев 18 23:27 cuobjdump > -rwxr-xr-x 1 root root 195600 фев 18 23:27 fatbinary > -rwxr-xr-x 1 root root 229504 фев 18 23:27 nvcc > -rwxr-xr-x 1 root root 417 фев 18 23:27 nvcc.profile > -rwxr-xr-x 1 root root 23034280 фев 18 23:27 nvdisasm > -rwxr-xr-x 1 root root 8092008 фев 18 23:27 nvlink > -rwxr-xr-x 1 root root 97168 фев 18 23:27 nvprune > -rwxr-xr-x 1 root root 7955808 фев 18 23:27 ptxas Nothing suspicious stands out. Let's oolk at the output of: $ PORTAGE_TMPDIR=/tmp/bug CFLAGS="-O2 -pipe -mtune=native -flto=thin" CXXFLAGS="-O2 -pipe -mtune=native -flto=thin" LDFLAGS="-Wl,-O1 -Wl,--as-needed" CC=clang CXX=clang++ ebuild --debug webkit-gtk-2.26.4-r1.ebuild clean pretend; echo $?
(In reply to Sergei Trofimovich from comment #13) > (In reply to Anton Gubarkov from comment #11) > > Nothing suspicious stands out. Let's oolk at the output of: > > $ PORTAGE_TMPDIR=/tmp/bug CFLAGS="-O2 -pipe -mtune=native -flto=thin" > CXXFLAGS="-O2 -pipe -mtune=native -flto=thin" LDFLAGS="-Wl,-O1 > -Wl,--as-needed" CC=clang CXX=clang++ ebuild --debug > webkit-gtk-2.26.4-r1.ebuild clean pretend; echo $? I've attached the output (~ 900K) https://bugs.gentoo.org/attachment.cgi?id=620736. And it did fail...
(In reply to Anton Gubarkov from comment #6) > I tracked this call in the ebuild > if ! test-flag-CXX -std=c++17 ; then > die "You need at least GCC 7.3.x or Clang >= 5 for C++17-specific > compiler flags" > fi > > to flag-o-matic and added debug echoes to it. I ran the test command that > flagomatic run to test -std=c++17. > The only error was > clang-10: error: Unknown CUDA version 10.2. Assuming the latest supported > version 10.1 [-Werror,-Wunknown-cuda-version] I guess the trigger is a dev-util/nvidia-cuda-toolkit installed. clang tries to check if installed cuda is of supported version: https://github.com/llvm-mirror/clang/blob/ae6164e81a997145838d60883a373e79de1b8e78/lib/Driver/Driver.cpp#L623 Regardless of if you plan to use it or not in a target tuple. Looks like clang does not understand 10.2. It looks like '-Wno-unknown-cuda-version' is only supported by clang-10 and not before and gcc-5 and not before. You can try any of the workarounds to see if the above looks correct: - disable LLVM_TARGETS=NVPTX default - uninstall dev-util/nvidia-cuda-toolkit - install dev-util/nvidia-cuda-toolkit that provides older cuda
(In reply to Anton Gubarkov from comment #14) > (In reply to Sergei Trofimovich from comment #13) > > (In reply to Anton Gubarkov from comment #11) > > > > > Nothing suspicious stands out. Let's oolk at the output of: > > > > $ PORTAGE_TMPDIR=/tmp/bug CFLAGS="-O2 -pipe -mtune=native -flto=thin" > > CXXFLAGS="-O2 -pipe -mtune=native -flto=thin" LDFLAGS="-Wl,-O1 > > -Wl,--as-needed" CC=clang CXX=clang++ ebuild --debug > > webkit-gtk-2.26.4-r1.ebuild clean pretend; echo $? > > I've attached the output (~ 900K) > https://bugs.gentoo.org/attachment.cgi?id=620736. And it did fail... Thank you! Yeah, looks like normal clang is called here: + clang++ -Werror -std=c++17 -xc++ -c /tmp/bug/portage/net-libs/webkit-gtk-2.26.4-r1/temp/test-flag.cc -o /tmp/bug/portage/net-libs/webkit-gtk-2.26.4-r1/temp/test-flag.exe + cmdline+=(-Qunused-arguments) + clang++ -Werror -std=c++17 -xc++ -c /tmp/bug/portage/net-libs/webkit-gtk-2.26.4-r1/temp/test-flag.cc -o /tmp/bug/portage/net-libs/webkit-gtk-2.26.4-r1/temp/test-flag.exe -Qunused-arguments + die 'You need at least GCC 7.3.x or Clang >= 5 for C++17-specific compiler flags'
When I read the rationale to add -Werror to flagomatic, it seems that it was a workaround for clang giving warnings on unsupported flags. i tried to give -std=c++25 to clang w/o -Werror: PF16W6Y2 /tmp/bug/portage/net-libs/webkit-gtk-2.26.4-r1/temp # clang++ -std=c++25 -xc++ -c /tmp/bug/portage/net-libs/webkit-gtk-2.26.4-r1/temp/test-flag.cc -o /tmp/bug/portage/net-libs/webkit-gtk-2.26.4-r1/temp/test-flag.exe -Qunused-arguments clang-10: warning: Unknown CUDA version 10.2. Assuming the latest supported version 10.1 [-Wunknown-cuda-version] error: invalid value 'c++25' in '-std=c++25' note: use 'c++98' or 'c++03' for 'ISO C++ 1998 with amendments' standard note: use 'gnu++98' or 'gnu++03' for 'ISO C++ 1998 with amendments and GNU extensions' standard note: use 'c++11' for 'ISO C++ 2011 with amendments' standard note: use 'gnu++11' for 'ISO C++ 2011 with amendments and GNU extensions' standard note: use 'c++14' for 'ISO C++ 2014 with amendments' standard note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU extensions' standard note: use 'c++17' for 'ISO C++ 2017 with amendments' standard note: use 'gnu++17' for 'ISO C++ 2017 with amendments and GNU extensions' standard note: use 'c++20' for 'ISO C++ 2020 DIS' standard note: use 'gnu++20' for 'ISO C++ 2020 DIS with GNU extensions' standard It bailed out ok giving the error.
(In reply to Anton Gubarkov from comment #17) > When I read the rationale to add -Werror to flagomatic, it seems that it was > a workaround for clang giving warnings on unsupported flags. My understanding is that clang still has many flags that it ignores but accepts for "compatibility" with gcc. $ clang a.c -o a --param=l1-cache-line-size=64 clang-10: warning: argument unused during compilation: '--param=l1-cache-line-size=64' [-Wunused-command-line-argument] We might end up doing one of: - dropping -Werror and live with warnings. that might break some picky build systems, but is should not be too much worse as most ebuilds don't filter CFLAGS at all and thus already these warnings. - changing -Werror to more targeted -Werror=unused-command-line-argument - detecting and using -Wunknown-cuda-version, similar to what we do with -Qunused-arguments
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ab8fe14ae2e9110faa85ca1c4528b470c0be1535 commit ab8fe14ae2e9110faa85ca1c4528b470c0be1535 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2020-03-20 22:28:19 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2020-03-20 22:33:36 +0000 flag-o-matic.eclass: don't use -Werror in test-flag-PROG(), bug #712488 -Werror filters out too much (everything) if used compiler happens to always generate warnings. Let's drop cosmetic stripping of ignored flags until we really need it. Then we can consider more selective filtering by using more targeted -Werror= options. Reported-by: Anton Gubarkov Closes: https://bugs.gentoo.org/712488 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> eclass/flag-o-matic.eclass | 19 ++++++++----------- eclass/tests/flag-o-matic.sh | 10 ++++++---- 2 files changed, 14 insertions(+), 15 deletions(-)
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a5003d48705fa9b501022d4e6326c8f516a2eec0 commit a5003d48705fa9b501022d4e6326c8f516a2eec0 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2020-03-26 07:49:07 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2020-03-26 07:50:41 +0000 flag-o-matic.eclass: revert "don't use -Werror in test-flag-PROG(), bug #712488" This reverts commit ab8fe14ae2e9110faa85ca1c4528b470c0be1535. Triggers build failures on sys-libs/compiler-rt-sanitizers. Reported-by: Craig Andrews Bug: https://bugs.gentoo.org/714742 Bug: https://bugs.gentoo.org/712488 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> eclass/flag-o-matic.eclass | 19 +++++++++++-------- eclass/tests/flag-o-matic.sh | 10 ++++------ 2 files changed, 15 insertions(+), 14 deletions(-)
Removal of -Werror caused bug #714742. We'll need to fix that first to re-apply again.
The clang warning is fixed in 10.0.0. It would really be appreciated if you had reported the clang problem earlier instead of debating how to workaround it. It would certainly have saved me from requesting a last minute backport.
(In reply to Michał Górny from comment #22) > The clang warning is fixed in 10.0.0. In my opinion strip-unsupported-flags should not rely on warning-free output of a compiler. > It would really be appreciated if you > had reported the clang problem earlier instead of debating how to workaround > it. It would certainly have saved me from requesting a last minute backport. I did not see it as a clang problem.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=9c5a9175843ce79427b04a5f23927a415d78d057 commit 9c5a9175843ce79427b04a5f23927a415d78d057 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2020-03-26 08:22:50 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2020-03-26 08:23:59 +0000 flag-o-matic.eclass: document assumptions and limitations of test-flag-PROG() Bug: https://bugs.gentoo.org/712488 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> eclass/flag-o-matic.eclass | 11 +++++++++++ 1 file changed, 11 insertions(+)
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=4b535e8f1ed0f6afd8e23e0e0c99b65bea6163f6 commit 4b535e8f1ed0f6afd8e23e0e0c99b65bea6163f6 Author: Sam James <sam@gentoo.org> AuthorDate: 2022-07-26 04:41:01 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2022-07-26 04:41:22 +0000 flag-o-matic.eclass: add bug references re -Qunused-arguments To ensure we pay attention to these if changing in future (like I've been wondering about) Bug: https://bugs.gentoo.org/712488 Bug: https://bugs.gentoo.org/714742 Signed-off-by: Sam James <sam@gentoo.org> eclass/flag-o-matic.eclass | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
